Bitcoin miners earn two different types of revenue when they find a valid block: the block subsidy and transaction fees. Together they make up the miner’s block reward, but only one of them creates new bitcoin.
Block subsidy = newly created BTC.
Transaction fees = existing BTC transferred from users to the miner.
That distinction matters because Bitcoin’s subsidy keeps shrinking through halvings, while transaction fees are expected to become a larger part of miner revenue over the long run.
The block subsidy creates new bitcoin
The block subsidy is the protocol-defined amount of new bitcoin a miner may create in the coinbase transaction when it finds a valid block. The subsidy is Bitcoin’s issuance mechanism.
Bitcoin’s current subsidy is 3.125 BTC per block. At the target pace of roughly 144 blocks per day, that works out to about 450 newly issued BTC per day.
Our recent explainer How Many Bitcoin Are Rewarded Every Day? walks through that math in detail.
Transaction fees do not create new bitcoin
Every Bitcoin transaction may include a fee. When a miner includes that transaction in a block, the fee can be collected by the miner through the coinbase transaction.
Those fees are not newly issued coins. The bitcoin already existed. It simply moves from the transaction sender to the miner.
If a block contains a 3.125 BTC subsidy and 0.25 BTC of transaction fees, the miner receives:
3.125 BTC subsidy + 0.25 BTC fees = 3.375 BTC total block reward.
Only the 3.125 BTC increases Bitcoin’s circulating supply.
The block reward is subsidy plus fees
The phrase block reward is often used casually to mean the subsidy alone, but technically the miner’s total block revenue includes both components:
Block reward = block subsidy + transaction fees.
That is why two blocks found at the same subsidy can pay miners different amounts. The subsidy is fixed by consensus for the current halving era, while fee revenue changes from block to block.
The subsidy is predictable; fees are market-driven
Bitcoin’s subsidy schedule is predetermined. It falls by half every 210,000 blocks. Everyone can calculate the current subsidy from block height.
Transaction fees are different. They emerge from demand for limited block space. Users choose fee rates, wallets estimate what may be needed for confirmation, and miners generally prefer transactions that offer higher fee revenue for the available block space.
When the mempool is quiet, low-fee transactions may clear quickly. When demand surges, users can compete more aggressively for inclusion and miner fee revenue can rise sharply.
The halving only cuts the subsidy
A Bitcoin halving does not cut transaction fees in half. It cuts only the block subsidy.
Before the April 2024 halving, miners could create 6.25 BTC per valid block. After block 840,000, that fell to 3.125 BTC. Transaction fees remained whatever users were willing to pay for block space.
BitcoinVersus covered the approaching change in our February 2024 halving explainer, when expected new issuance was still approximately 900 BTC per day. After the halving, expected issuance dropped to roughly 450 BTC per day.
Fees can temporarily exceed the subsidy
Nothing in Bitcoin requires transaction fees to remain smaller than the subsidy. During periods of intense block-space demand, fee revenue can approach or even exceed the subsidy in individual blocks.
That does not mean Bitcoin has permanently transitioned to a fee-funded security model. Fee spikes can be brief, while the subsidy provides a much more predictable baseline during each halving era.
Subsidy revenue declines mechanically
The subsidy follows a known path:
- 2009: 50 BTC per block
- 2012: 25 BTC
- 2016: 12.5 BTC
- 2020: 6.25 BTC
- 2024: 3.125 BTC
- Next halving: 1.5625 BTC
That shrinking subsidy is part of why miner economics become tighter over time unless higher Bitcoin prices, stronger fee revenue, better hardware efficiency, or lower operating costs offset the reduction.
We were already examining that pressure in our January 2024 analysis of Luxor’s hashprice outlook. Hashprice ultimately reflects the revenue pool miners are competing for—including both subsidy and fee income.
Fees are Bitcoin’s long-term miner-revenue transition
Bitcoin’s subsidy cannot remain the dominant miner incentive forever because it keeps halving. Far in the future, when subsidy issuance becomes negligible, miners will increasingly depend on transaction fees.
That is why Bitcoin’s fee market is more than an inconvenience for users. It is part of the long-term economic design that pays miners for ordering transactions and extending the proof-of-work chain after new-coin issuance becomes very small.
Block subsidy vs. transaction fees
| Question | Block subsidy | Transaction fees |
|---|---|---|
| Where does the BTC come from? | Newly issued by Bitcoin consensus rules | Existing BTC paid by users |
| Does it increase supply? | Yes | No |
| Current amount | 3.125 BTC per block | Variable |
| Who determines it? | Consensus rules and block height | Users, wallet fee selection, block-space demand, and miner transaction selection |
| Does the halving reduce it? | Yes, by 50% | No direct reduction |
| Can it vary block to block? | No during the same subsidy era | Yes |
| Long-term role | Declines toward zero | Expected to become a larger share of miner revenue |
Why this matters to mining profitability
A miner does not care only about the subsidy. What matters operationally is total revenue compared with total cost.
When fees are strong, they can soften the impact of high difficulty or a lower subsidy. When fees are weak, miners depend more heavily on Bitcoin price, efficient ASICs, cheap electricity, high uptime, and disciplined site operations.
This connects directly to Hashrate vs. Hashprice: hashprice rises when the revenue available to miners rises, whether that comes from a higher BTC price, stronger transaction fees, or other favorable changes in the mining economy.
The easiest way to remember it
The subsidy is Bitcoin paying miners with newly issued coins. Transaction fees are users paying miners with bitcoin that already exists.
Both can land in the same coinbase transaction. Both contribute to miner revenue. But only the subsidy expands Bitcoin’s supply—and that subsidy is designed to keep shrinking.
BitcoinVersus.Tech Editor’s Note: The block subsidy is currently 3.125 BTC per valid block. Transaction-fee revenue is variable and can change substantially from block to block. Total miner profitability also depends on difficulty, Bitcoin price, pool economics, electricity, efficiency, uptime, labor, maintenance, and other operating costs.
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